public async Task <IActionResult> Add(int id)
        {
            var series = await _naniWebContext.Series.SingleAsync(srs => srs.Id == id);

            ViewData["SeriesName"] = series.Name;
            var model = new ChapterAdd
            {
                SeriesId = series.Id
            };

            return(View("AddChapter", model));
        }
        public async Task <IActionResult> Add(ChapterAdd chapterAdd)
        {
            if (ModelState.IsValid)
            {
                var series = await _naniWebContext.Series.SingleAsync(srs => srs.Id == chapterAdd.SeriesId);

                var chapter = new Chapter
                {
                    Volume        = chapterAdd.Volume ?? 0,
                    ChapterNumber = chapterAdd.ChapterNumber,
                    Name          = chapterAdd.Name ?? string.Empty,
                    SeriesId      = series.Id,
                    Pages         = new List <Page>(),
                    ReleaseDate   = DateTime.UtcNow
                };

                var temp        = Utils.CurrentDirectory.CreateSubdirectory($"Temp{Path.DirectorySeparatorChar}{Guid.NewGuid()}");
                var tempPages   = temp.CreateSubdirectory("Pages");
                var destination = $"{_webHostEnvironment.WebRootPath}{Path.DirectorySeparatorChar}images{Path.DirectorySeparatorChar}pages{Path.DirectorySeparatorChar}";
                var pagesZip    = $"{temp.FullName}{Path.DirectorySeparatorChar}pages.zip";
                Directory.CreateDirectory(destination);

                using (var stream = System.IO.File.Create(pagesZip))
                {
                    await chapterAdd.Pages.CopyToAsync(stream);
                }

                ZipFile.ExtractToDirectory(pagesZip, tempPages.FullName);
                var pageList = tempPages.EnumerateFiles().Where(fl => fl.Extension == ".png").OrderBy(fl => fl.Name.Length).ThenBy(fl => fl.Name).ToList();

                if (pageList.Count == 0)
                {
                    temp.Delete(true);

                    TempData["Error"] = true;

                    return(RedirectToAction("Add"));
                }

                for (var i = 0; i < pageList.Count; i++)
                {
                    var page = new Page
                    {
                        PageNumber = i
                    };

                    do
                    {
                        page.Id = Guid.NewGuid();
                    } while (System.IO.File.Exists($"{destination}{page.Id}.png"));

                    chapter.Pages.Add(page);

                    pageList[i].CopyTo($"{destination}{page.Id}.png");
                }

                await _naniWebContext.Chapters.AddAsync(chapter);

                await _naniWebContext.SaveChangesAsync();

                var siteName           = _settingsKeeper.GetSetting("SiteName").Value;
                var chapterUrl         = $"{_settingsKeeper.GetSetting("SiteUrl").Value}{Url.Action("Project", "Home", new {urlSlug = series.UrlSlug, chapterNumber = chapter.ChapterNumber})}";
                var chapterDownloadUrl = $"{_settingsKeeper.GetSetting("SiteUrl").Value}{Url.Action("Download", "Home", new {urlSlug = series.UrlSlug, chapterNumber = chapter.ChapterNumber})}";
                var iconUrl            = $"{_settingsKeeper.GetSetting("SiteUrl").Value}/assets/icon.png";
                var tasks = new Task[4];

                tasks[0] = Task.Run(async() =>
                {
                    var mangadexSeries = await _naniWebContext.MangadexSeries.SingleOrDefaultAsync(srs => srs.SeriesId == series.Id);

                    MangadexChapter mangadexChapter = null;

                    if (chapterAdd.UploadToMangadex && mangadexSeries.MangadexId > 0)
                    {
                        using (var stream = System.IO.File.OpenRead(pagesZip))
                        {
                            mangadexChapter = await _mangadexUploader.UploadChapter(chapter, mangadexSeries, stream);
                        }
                    }

                    if (mangadexChapter == null)
                    {
                        mangadexChapter = new MangadexChapter
                        {
                            Chapter    = chapter,
                            ChapterId  = chapter.Id,
                            MangadexId = 0
                        }
                    }
                    ;

                    await _naniWebContext.MangadexChapters.AddAsync(mangadexChapter);
                    await _naniWebContext.SaveChangesAsync();
                });
                tasks[1] = Task.Run(async() =>
                {
                    await _firebaseCloudMessaging.SendNotification($"A new release is available at {siteName}!", $"New chapter of {series.Name} is available at {siteName}!", chapterUrl, iconUrl, $"series_{series.Id}");
                });
                tasks[2] = Task.Run(async() =>
                {
                    if (chapterAdd.AnnounceOnDiscord)
                    {
                        await _discordBot.SendMessage($"@everyone **{series.Name}** - Chapter {chapter.ChapterNumber} is out!{Environment.NewLine}Read it here: {chapterUrl}{Environment.NewLine}Download it here: {chapterDownloadUrl}");
                    }
                });
                tasks[3] = Task.Run(async() =>
                {
                    if (chapterAdd.AnnounceOnReddit)
                    {
                        await _redditPoster.PostLink("/r/manga", $"[DISC] {series.Name} - Chapter {chapter.ChapterNumber}", chapterUrl, chapterAdd.RedditNsfw);
                    }
                });

                await Task.WhenAll(tasks);

                temp.Delete(true);

                return(RedirectToAction("List", "SeriesManager", new { id = series.Id }));
            }

            TempData["Error"] = true;

            return(RedirectToAction("Add"));
        }